1. General Introduction
Rosemount 644 temperature transmitters is a basic type transmitter for temperature measurement, accepts single or dual input from universal sensors such as RTD, thermal couple , mill volt and etc. It's is flexible to be configured as different styles such as DIN head mount, field mount, and rail mount with variety output protocols. It's also can be integrated easily to different type of sensors such as 0065 RTD and 0185 thermocouples.
2. Electrical & Physical specifications
Rosemount model | Power and Sensor Terminals |
644 head mount (HART) | Captivated screw terminals permanently fixed to terminal block |
644 head mount (FOUNDATION Fieldbus/PROFIBUS) | Compression screw terminals permanently fixed to the terminal block |
644 field mount (HART) | Captivated screw terminals permanently fixed to the terminal block |
644 rail mount (HART) | Compression screw permanently fixed to front panel |
Field Communicator Connections | Communication Terminals |
Rosemount 644 head/field mount | Clips permanently fixed to terminal block |
Rosemount 644 rail mount | Clips permanently fixed to front panel |
Materials of Construction | Electronics Housing and Terminal Block |
Rosemount 644 head/ field mount | GE polyphenylene oxide glass reinforced GFN -2 or -3 |
Rosemount 644 rail mount | Polycarbonate |
Housing | Low-copper aluminum |
Paint | Polyurethane |
Cover O-ring | Buna-N |
3. Basic code selection of 644 temperature transmitter
Main Code | Suffix codes | Description | |||
644 | Temperature transmitter | ||||
Transmitter type | H | DIN A head mount - single sensor input | |||
Model | R | Rail mount - single sensor input | |||
S | DIN A head mount - dual sensor input (HART only) | ||||
F | Field mount - single sensor input (HART only) | ||||
D | Field mount - dual sensor input (HART only) | ||||
Output | A | 4–20 mA with digital signal based on HART protocol | |||
F | FOUNDATION Fieldbus digital signal | ||||
W | PROFIBUS PA digital signal | ||||
Product certifications | NA | No approval | |||
E5 | USA Explosion-proof; Dust Ignition-proof | ||||
I5 | USA Intrinsically Safe; Non-incendive | ||||
K5 | USA Explosionproof; Intrinsically Safe; Non-incendive; Dust Ignitionproof | ||||
NK | IECEx Dust | ||||
KC | USA and Canada Intrinsically Safe and Non-incendive | ||||
KB | USA and Canada: Explosion-proof; Intrinsically Safe; Non-incendive; Dust Ignition-proof | ||||
KD | USA, Canada, and ATEX Explosionproof, Intrinsically Safe | ||||
I6 | Canada Intrinsically Safe | ||||
K6 | Canada Explosionproof; Intrinsically Safe; Non-incendive; Dust Ignition-proof | ||||
I3 | Dubai of UAE Intrinsic Safety | ||||
E3 | Dubai of UAE Flameproof | ||||
N3 | Dubai of UAE Type n | ||||
E1 | ATEX Flameproof | ||||
N1 | ATEX Type n | ||||
NC | ATEX Type n Component | ||||
K1 | ATEX Flameproof; Intrinsic Safety; Type n; Dust | ||||
ND | ATEX Dust Ignition–Proof | ||||
KA | Canada and ATEX: Explosion proof; Intrinsically Safe; Non-incendive | ||||
I1 | ATEX Intrinsic Safety | ||||
E7 | IECEx Flameproof | ||||
I7 | IECEx Intrinsic Safety | ||||
N7 | IECEx Type n | ||||
NG | IECEx Type n Component | ||||
K7 | IECEx Flameproof; Intrinsic Safety; Type n; Dust | ||||
I2 | INMETRO Intrinsic Safety | ||||
E4 | Japan Flameproof | ||||
I4 | Japan Intrinsic Safety | ||||
E2 | INMETRO Flameproof | ||||
EM | Technical Regulations Customs Union (EAC) Flameproof | ||||
IM | Technical Regulations Customs Union (EAC) Intrinsic Safety | ||||
KM | Technical Regulations Customs Union (EAC) Flameproof, Intrinsic Safety, and Dust-Ignitionproof | ||||
Optional codes | Optional codes | ||||
4. Typical mounting & dimensions for 644 temperature transmitter
